public class Nums {
    public static void main(String[] args){
        int a =20;
        int b =20;
        boolean bo1 = (++a % 3 == 0) && (a++ % 7==0);
        System.out.println("aֵ"+a);
        System.out.println("bo1ֵ"+bo1);

        boolean bo2 = (b++ % 3 == 0) && (++b %7==0 );
        System.out.println("bֵ"+b);
        System.out.println("bo2ֵ"+bo2);
    }
}

